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Features Integrations & API Resources Home / Custom Fields Go beyond basic contact info. With SMASHSEND Custom Fields, track any data that matters to your business — from shoe sizes to subscription tiers, purchase histor
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The most flexible custom fields in email marketing
While others limit you to basic fields, SMASHSEND gives you the power to store any data type, create complex properties, and use them everywhere. ∞ Unlimited fields 10+ Data types 0ms Real-time sync
Every data type you need
Text & numbers Store names, descriptions, IDs, scores, prices, quantities, or any text and numeric data. Perfect for basic customer information and metrics. Lists & arrays Track multiple values like product interests, ta
Use custom fields everywhere
Your custom fields aren't locked away — use them across the entire SMASHSEND platform for truly personalized experiences. In email campaigns Personalize every email with custom field tokens. Display customer-specific dat
Personalize with field tokens
Reference any property directly in your campaign copy.
Real-world use cases
See how businesses use SMASHSEND Custom Fields to create powerful, data-driven email experiences. E-commerce Personalization that uses real history Track purchase history, browsing behavior, size preferences, and wish li
SMASHSEND vs. limited field systems
Most email platforms limit you to basic fields. See why developers and marketers choose SMASHSEND for true flexibility. Feature SMASHSEND Others Number of custom fields Unlimited 10-50 fields Data types supported All typ
Developer-friendly integration
Built by developers, for developers. Integrate custom fields with your application in minutes, not days.
Part of the complete SMASHSEND platform
Custom fields work seamlessly with every SMASHSEND feature. One platform, infinite possibilities.
Start building with custom fields today
Join thousands of businesses using SMASHSEND Custom Fields to create truly personalized email experiences. Unlimited fields • All data types • Full API access • Free forever
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